Loaded down with huge plastic bags in decrepit shopping carts, they criss-cross New York night and day, scavenging trash bins for cans and bottles. This invisible army is made up of young and old, men and women, jobless people, the homeless,...

A new process for creating high-tech carbon nanotube membranes out of a very common waste material — plastic bags — has been developed by researchers at the University of Adelaide. The innovative approach to nanotube production could...